CN102031950B - Hole-forming process method for comb gas extraction borehole in coal seam roof - Google Patents

Hole-forming process method for comb gas extraction borehole in coal seam roof Download PDF

Info

Publication number
CN102031950B
CN102031950B CN2010105745830A CN201010574583A CN102031950B CN 102031950 B CN102031950 B CN 102031950B CN 2010105745830 A CN2010105745830 A CN 2010105745830A CN 201010574583 A CN201010574583 A CN 201010574583A CN 102031950 B CN102031950 B CN 102031950B
Authority
CN
China
Prior art keywords
hole
roof
drilling
coal seam
pectination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN2010105745830A
Other languages
Chinese (zh)
Other versions
CN102031950A (en
Inventor
姚宁平
李泉新
石智军
孙荣军
田东庄
王毅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Research Institute Co Ltd of CCTEG
Original Assignee
SIAN BRANCH OF CHINA COAL RESEARCH INSTITUTE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SIAN BRANCH OF CHINA COAL RESEARCH INSTITUTE filed Critical SIAN BRANCH OF CHINA COAL RESEARCH INSTITUTE
Priority to CN2010105745830A priority Critical patent/CN102031950B/en
Publication of CN102031950A publication Critical patent/CN102031950A/en
Application granted granted Critical
Publication of CN102031950B publication Critical patent/CN102031950B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention relates to a process method for carrying out gas extraction through a downward multi-branch comb borehole in a coal seam roof. At present, the gas extraction is mostly carried out by adopting a highly-located roadway in the roof, a highly-located borehole in the roof or a seam-crossing borehole in a floor and the like, and the shortcomings are as follows: the extraction cost is increased, the production efficiency is affected and the cycle is prolonged. In the hole-forming process method for the comb gas extraction borehole in the coal seam roof, a motor at the bottom of a hole is adopted for being matched with a measuring device while drilling for carrying out directional drilling from the coal seam roof, a special packing whipstock is dived from the hole after a drill is hoisted, the motor at the bottom of the hole, which has small diameter and large bend angle, is adopted for carrying out backward downward branch construction, and a group of downward comb multi-branch holes in the coal seam roof are formed; and the drill is raised up, and a hole sealing pipe is communicated with a gas extraction pipeline for carrying out the gas extraction. The process method has the advantages of low construction cost and short cycle. The process method is used for gas extraction through the highly-located borehole in the coal seam roof, has the characteristic of realizing multiple purposes in one hole, and can ensure that comprehensive three-dimensional high-efficient gas extraction before, during and after the extraction is realized.

Description

The pore-forming technique method of roof pectination mash gas pumping drilling
One, technical field
The present invention relates to a kind of pore-forming technique method of roof mash gas pumping drilling; Utilize that rotary motive power drilling tool and special-purpose whipstock carry out constructing to the pectination branched hole under the roof at the bottom of the hole; Can reach the purpose of " use more in a hole "; Realize " adopt preceding, adopt, adopt back " comprehensive mash gas extraction, improve the efficient of hole pumping and mining gas greatly.
Two, background technology
It is main energy-consuming big country with the coal that China is one, and almost 95% coal resources are from underground mining, and condition of coal seam occurrence is complicated and changeable, and dynamic disaster accidents such as gas and dust explosion, coal and gas are outstanding, roof collapse happen occasionally.In coal mine roof plate, gas, water damage three big disasters, gas accident occupies ratio in particularly serious accident the highest, and the gas disaster is the biggest threat of restriction Coal Production.In China's minable coal seam, absolute ratio is occupied in the soft low coal seam of passing through, and along with the continuous extension of the coal mining degree of depth, this ratio also will increase, the working condition more sophisticated of coal mine operation, and the security threat that the constructor receives is also more and more serious.Weak seam is because loosely organized, in this coal seam drilling process, occurs drilling accidents such as spray orifice, gas are outstanding, hole wall collapse easily, and drilling depth is very limited, and seriously restricts Safety of Coal Mine Production, influence driving or coal mining efficient.
Three, summary of the invention
The objective of the invention is to develop a kind of pore-forming technique method of roof pectination mash gas pumping drilling; Be primarily aimed at characteristics such as drilling accident such as occurring spray orifice, gas are outstanding, hole wall collapse in the weak seam drilling process easily; The special proposition a kind ofly arranges down that along the coal seam boring of multiple-limb pectination carries out the drilling and forming hole process of gas pumping; Popularization with strong points, simple to operate, easy; Can greatly improve the efficient of the high-order directional drilling mash gas extraction of top board, for the arrangement of soft projecting coal bed mash gas pumping drilling has proposed new thinking.
The present invention proposes to arrange the high-order directed long drilled holes of nearly level along roof; And in nearly horizontal orientation hole, arrange that to the aperture downward multiple-limb pectination boring carries out gas pumping at the bottom of by the hole; Its hole pumping and mining gas purpose has two aspects, guarantees underground work safety during first aspect; Second aspect is that the gas with extraction is transported to ground and is used as clear energy sources; Can avoid a series of difficult problems that soft projecting coal bed direct boring accident is many, efficient is low, the degree of depth is limited, for the arrangement of soft projecting coal bed mash gas pumping drilling has proposed new thinking.The producing capacity of coal resources in China not only can be improved, and the generation of serious disasters and accidents can be avoided or reduce, significant for the safety and high efficiency that ensures coal in China.
For realizing above-mentioned purpose, technical solution of the present invention is (in order to understand conveniently, ask the while referring to accompanying drawing and description of drawings, label is placed in the bracket among the figure):
The pore-forming technique method of roof pectination mash gas pumping drilling is characterized in that: utilize at the bottom of the hole rotary motive power drilling tool and special-purpose packing whipstock (3) to carry out under the roof (II) to the construction of pectination branched hole the job practices following steps:
A. near exploitation work plane stop line, arrange drill site in the back (II), at roof (II) open interior, perforate bearing sense work plane trend; Creep into 15m and carry hole drilling and reaming, and hole sealing tube (5), blowout prevention and moisture trap (6) are installed, hole sealing tube (5) length is confirmed according to rock property;
B. install and carry out nearly horizontal orientation behind the hole sealing tube (5) and creep into; Motor at the bottom of the employing hole; Supporting measurement while drilling device carries out TRAJECTORY CONTROL, makes drilling track as far as possible according to design direction horizontal-extending in top board (II) fissure zone scope, up to the whole hole of main aperture projected depth;
After c, main aperture are carried brill eventually; Be lowered to special-purpose packing whipstock (3) at the bottom of the hole from main aperture, and then packing whipstock (3) put forward to first pressure kickoff point (KOP) adjustment packing whipstock (3) inclined-plane and bit tool face direction; Make its deflecting faced downwards; Adopt at the bottom of the hole of the big bent angle of minor diameter motor (4) to carry out deflecting and creep into, make drilling track keep least radius to extend, for avoid card bury drills tool in the coal seam (I) as far as possible up to the coal seam (I); Should strict control wear the coal degree of depth, available in case of necessity pressure-air wash boring behind the whole hole; Adopt " retrusive " to creep into branch method, other branched hole is accomplished in the same operation successively, finally forms one group of multi-branched pectination borehole shape.
D, pull out of hole at last, go up at hole sealing tube (5) and the gas pumping pipeline is installed is interconnected, accomplish one group of construction under the roof (II) to pectination multiple-limb hole.
Technical solution of the present invention also comprises:
The pore-forming technique method of described roof pectination mash gas pumping drilling; It is characterized in that: drill site is arranged in the roof (II); Main aperture (1) is directly from roof (II) tapping point (A) perforate; Motor (4) cooperated the measurement while drilling device to carry out orientation at the bottom of the hole was adopted in full hole, the last lower deviation of strict keyhole track, and guaranteeing that track is stablized in the rock stratum at top board (II) extends; Each branched hole (2) of holing is for distributing downwards; Adopt that motor (4) and target drill carry out deflecting branch at the bottom of the big bent angle of special-purpose packing whipstock (3) the guiding minor diameter hole; Branched hole (2) gets into whole hole, back, coal seam (I) (destination layer), coal seam (I) but proper extension hole depth when condition is better; Branched hole (2) is to be downwards main, and quantity is no less than 5, between radius of curvature R=50~100m.
The pore-forming technique method of described roof pectination mash gas pumping drilling is characterized in that: creep into flushing liquor and adopt no solid phase degradable type drilling fluid, its performance requirement is: drilling fluid shear force 5Pa~20Pa, and it is adjustable that plastic viscosity is controlled at 8~40mPaS; The slurries plastic viscosity kept 40~25mPaS in 1 day time, automatically reduce to below the 5mPaS in afterwards 2~3 days, and infiltration rate reaches 200ml/h.
Changing a mode below describes:
1. utilize at the bottom of the hole rotary motive power drilling tool and special-purpose whipstock to carry out under the roof to the construction of pectination branched hole, job practices comprises following steps:
A. near exploitation work plane stop line, arrange the drill site of going up a hill in the back, at the roof open interior, perforate bearing sense work plane trend; Creep into 15m and carry hole drilling and reaming, and hole sealing tube, blowout prevention and moisture trap are installed, hole sealing tube length is confirmed according to rock property;
B. install and carry out nearly horizontal orientation behind the hole sealing tube and creep into, adopt the hole at the bottom of the supporting measurement while drilling device of rotary motive power drilling tool carry out TRAJECTORY CONTROL, make drilling track as far as possible according to design direction horizontal-extending in top board fissure zone scope, up to the whole hole of main aperture projected depth;
C, main aperture are lowered to special-purpose whipstock at the bottom of the hole from main aperture after carrying brill eventually, and then whipstock is carried to first pressure kickoff point (KOP); Adjustment whipstock inclined-plane and bit tool face direction make its deflecting faced downwards, and motor carries out deflecting and creeps at the bottom of the hole of the big bent angle of employing minor diameter; Make drilling track keep least radius to extend up to the coal seam; For avoid card bury drills tool in the coal seam as far as possible, should strict control wear the coal degree of depth, available in case of necessity pressure-air wash boring behind the whole hole; Adopt " retrusive " to creep into branch method, other branched hole is accomplished in the same operation successively, net shape one group of multi-branched pectination boring as shown in Figure 1.
D, pull out of hole at last, the gas pumping pipeline is installed on hole sealing tube, accomplish one group of construction under the roof to pectination multiple-limb hole.
2. the present invention adopts a kind of no solid phase degradable drilling fluid, can in boring procedure, carry out retaining wall, prevents the boring hole of collapsing, can degraded automatically in the regular hour after boring forms, and the mediation coal-bed gas passage of gushing out does not influence the coal-bed gas extraction.Drilling fluid shear force 5Pa~20Pa, it is adjustable that plastic viscosity is controlled at 8~40mPaS; The slurries plastic viscosity kept 40~25mPaS in 1 day time, automatically reduce to below the 5mPaS in afterwards 2~3 days, and infiltration rate reaches 200ml/h.
The present invention compares with prior art has significant advantage (advantage and effect):
Soft projecting coal bed because this coal seam along layer Completion of Drilling Hole difficulty, adopts the high-order lane of top board, the high-order boring of top board or base plate layer-through drilling etc. to carry out gas pumping more.Adopt the high tunnel extraction of top board method,, increased the extraction cost greatly and influenced production efficiency because the roadway construction cost is high, the cycle is long; Adopt high-order boring of top board or base plate layer-through drilling extraction method, generally all need be at roof or base plate construct special-purpose tunnel or drill site, the construction of adit has also brought cost to increase and cycle stretch-out.Adopt under the layer top board that the present invention proposes to pectination multiple-limb hole, can be in the direct perforate of working seam work plane, the adit of need not constructing specially greatly reduces construction cost.Adopt no solid phase degradable type drilling fluid to improve the one-tenth porosity of boring destination layer position in the drilling process, and adopted horizontal orientation and the even pattern of multiple-limb, can keep the concentration of original gas greatly and improve gas pumping efficient.
Four, description of drawings
Accompanying drawing 1 is to the construction schematic diagram of multiple-limb pectination mash gas pumping drilling under one group of roof of the present invention.Accompanying drawing 2 is local structure for amplifying sketch mapes of branch point among Fig. 1.Accompanying drawing 3 is hole sealing tube of the present invention and steam-water separator structural representation.
Label and symbol description among the figure: 1. represent main aperture, 2. branched hole, 3. packing whipstock, 4. motor at the bottom of the hole, 5. hole sealing tube, 6. steam-water separator; I. coal seam, II. top board, III. unworked country, IV. minery, V. goaf, A. tapping point.
Five, the specific embodiment
With reference to the accompanying drawings and combine instance that the specific embodiment of content of the present invention is done further to specify:
The present invention relates to advance process to multiple-limb pectination gas pumping hole drill under a kind of roof; It is that motor 4 cooperates the measurement while drilling device to carry out the process that TRAJECTORY CONTROL is crept at the bottom of adopting the hole; Motor 4 realized that full hole is directed at the bottom of main aperture adopted the hole; Constantly the adjustment drilling track makes the main borehole track be tending towards level as early as possible, and in prediction fissure zone scope, keeps horizontal-extending; Utilize the branch point of special-purpose packing whipstock 3 control branch holes, adopt " retrusive " to creep into branch method, to the construction of branched hole, form one group and under the I top board II of coal seam, hole under accomplishing successively to the multiple-limb pectination.
. confirming of drill holes layer position
Confirm boring main aperture layer position according to record earlier before creeping into, require main aperture 1 in the roof II, to extend.
. perforate is also installed orifice tube
According to the drilling track designing requirement, confirm tapping point A (referring to Fig. 1), inclination angle and azimuth, utilize rotary drilling to creep into 15m and carry brill, utilize reaming bit to expand then and at the bottom of the hole of holing, carry brill, hole sealing tube 5 is installed and is utilized polyurethane that hole sealing tube 5 is carried out sealing of hole.For avoiding drill site gas exceeding limit in the drilling process, creep on need connection steam-water separator 6 realization limits, G&W, limit mash gas extraction are separated in the limit, guarantees to creep into safety.
. the TRAJECTORY CONTROL of main aperture
Begin to carry out main aperture 1 behind the sealing of hole and creep into, motor 4 supporting measurement while drilling devices carry out TRAJECTORY CONTROL at the bottom of the employing hole, make boring 1 track as far as possible according to design direction nearly horizontal-extending in top board fissure zone scope, up to the whole hole of main aperture 1 projected depth;
. construct to the multiple-limb hole down
Main aperture is lowered to special-purpose packing whipstock 3 at the bottom of the hole from main aperture after carrying brill eventually, and then whipstock 3 is carried to first pressure kickoff point (KOP); Adjustment packing whipstock 3 inclined-planes and bit tool face direction make its deflecting faced downwards, and (motor 4 is claimed helicoid hydraulic motor again to motor 4 at the bottom of the hole at the bottom of the hole of the big bent angle of employing minor diameter; Main effect is rotation under the effect of water under high pressure, rotates thereby drive hole subdrilling head, itself has camber can realize the directional drilling of holing) carry out deflecting and creep into; Make boring 2 tracks keep least radius to extend up to the coal seam; For avoid card bury drills tool in the coal seam as far as possible, should strict control wear the coal degree of depth, available in case of necessity pressure-air wash boring behind the whole hole; Adopt " retrusive " to creep into branch method, other branched hole is accomplished in the same operation successively, and net shape is as shown in Figure 1.Main aperture is nearly horizontal orientation hole, is arranged in coal seam I top board II stabilized zone; Branched hole 2 is with downward distribution, and quantity is no less than 5, between radius of curvature R=50~100 meter.
. the sealing of hole connecting leg
After drilling construction finishes, drilling and sealing pipe 5 is connected with the coal mine gas extraction pipeline, gas to ground utilizes or discharging in the extraction borehole.
. the performance of drilling fluid (adopting commercially available model is products such as CMDL-1, CMDM-1, as long as can reach the performance of drilling fluid of the present invention)
(1) (Pa is a drilling fluid shear force standard unit to drilling fluid shear force 5Pa~20Pa; Destroy the required power of space truss structure on the drilling fluid unit area when expression drilling fluid is static); It is adjustable that plastic viscosity is controlled at 8~40mPaS, and outstanding slag ability (decrease speed under the inactive state) is more than 5 times of wash boring liquid.
(2) be the boring of 0.3~0.8 irregular coal seam for coal seam Polodyakonov coefficient coefficient f coefficient, can suppress collapsing of hole wall.Be presented as that the drilling fluid fluid loss is less than 12ml/30min; Soak softening degree and be merely 60% of conventional mud; Mud page or leaf matter swell increment is less than 50% of conventional drilling liquid; To the viscous force of rotten rib coal 1.2 times greater than conventional drilling liquid.
(3) the slurries plastic viscosity kept 40~25mPaS in 1 day time, automatically reduced to below the 5mPaS in afterwards 2~3 days.The permeability recovery effects is: meeting under the pressure reduction of actual condition, do not having infiltration basically in 18 hours, infiltration rate increases gradually afterwards, and infiltration rate reaches 200ml/h during to 30 hours.Can make the permeability of payzone recover to reach more than 85%.
(4) drilling fluid rheology, hydraulic characteristic, fluid power characteristic and sand content index satisfy the instructions for use of screw motor.

Claims (4)

1. the pore-forming technique method of roof pectination mash gas pumping drilling is characterized in that: utilize at the bottom of the hole rotary motive power drilling tool and special-purpose packing whipstock (3) to carry out under the roof (II) to the construction of pectination branched hole the job practices following steps:
A. near exploitation work plane stop line, arrange drill site in the roof (II), at roof (II) open interior, perforate bearing sense work plane trend; Creep into 15m and carry hole drilling and reaming, and hole sealing tube (5), blowout prevention and moisture trap (6) are installed, hole sealing tube (5) length is confirmed according to rock property;
B. install and carry out nearly horizontal orientation behind the hole sealing tube (5) and creep into; Motor at the bottom of the employing hole; Supporting measurement while drilling device carries out TRAJECTORY CONTROL, makes drilling track as far as possible according to design direction horizontal-extending in roof (II) fissure zone scope, up to the whole hole of main aperture projected depth;
After c, main aperture are carried brill eventually; Be lowered to special-purpose packing whipstock (3) at the bottom of the hole from main aperture, and then packing whipstock (3) put forward to first pressure kickoff point (KOP) adjustment packing whipstock (3) inclined-plane and bit tool face direction; Make its deflecting faced downwards; Adopt at the bottom of the hole of the big bent angle of minor diameter motor (4) to carry out deflecting and creep into, make drilling track keep least radius to extend, for avoid card bury drills tool in the coal seam (I) as far as possible up to the coal seam (I); Should strict control wear the coal degree of depth, whole Kong Houyong pressure-air wash boring; Adopt " retrusive " to creep into branch method, other branched hole is accomplished in the same operation successively, finally forms one group of multi-branched pectination borehole shape.
2. the pore-forming technique method of roof pectination mash gas pumping drilling according to claim 1 is characterized in that: also comprise the steps:
D, pull out of hole at last, go up at hole sealing tube (5) and the gas pumping pipeline is installed is interconnected, accomplish one group of construction under the roof (II) to pectination multiple-limb hole.
3. the pore-forming technique method of roof pectination mash gas pumping drilling according to claim 1; It is characterized in that: drill site is arranged in the roof (II); Main aperture (1) is directly from roof (II) tapping point (A) perforate; Motor (4) cooperated the measurement while drilling device to carry out orientation at the bottom of the hole was adopted in full hole, the last lower deviation of strict keyhole track, and guaranteeing that track is stablized in the rock stratum at roof (II) extends; Each branched hole (2) of holing is for distributing downwards; Adopt that motor (4) and target drill carry out deflecting branch at the bottom of the big bent angle of special-purpose packing whipstock (3) the guiding minor diameter hole; Branched hole (2) gets into whole hole, back, coal seam (I), coal seam (I) but proper extension hole depth when condition is better; Branched hole (2) is to be downwards main, and quantity is no less than 5, between radius of curvature R=50~100m.
4. the pore-forming technique method of roof pectination mash gas pumping drilling according to claim 1; It is characterized in that: creep into flushing liquor and adopt no solid phase degradable type drilling fluid; Its performance requirement is: drilling fluid shear force 5Pa~20Pa, and plastic viscosity is controlled in 8~40mPaS scope; The slurries plastic viscosity kept 40~25mPaS in 1 day time, automatically reduce to below the 5mPaS in afterwards 2~3 days, and infiltration rate reaches 200ml/h.
CN2010105745830A 2010-12-06 2010-12-06 Hole-forming process method for comb gas extraction borehole in coal seam roof Active CN102031950B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105745830A CN102031950B (en) 2010-12-06 2010-12-06 Hole-forming process method for comb gas extraction borehole in coal seam roof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105745830A CN102031950B (en) 2010-12-06 2010-12-06 Hole-forming process method for comb gas extraction borehole in coal seam roof

Publications (2)

Publication Number Publication Date
CN102031950A CN102031950A (en) 2011-04-27
CN102031950B true CN102031950B (en) 2012-02-15

Family

ID=43885340

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010105745830A Active CN102031950B (en) 2010-12-06 2010-12-06 Hole-forming process method for comb gas extraction borehole in coal seam roof

Country Status (1)

Country Link
CN (1) CN102031950B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015157812A1 (en) * 2014-04-14 2015-10-22 Peabody Energy Australia A multi purpose drilling system and method
CN111305891A (en) * 2019-12-03 2020-06-19 安徽理工大学 Three-dimensional comprehensive efficient and accurate treatment technical method for coal-oil-gas coexisting mine

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102226413B (en) * 2011-05-24 2013-10-30 中国矿业大学 Gas extraction method of cross hole drilling area of gas discharge laneway
CN102852546B (en) * 2011-06-30 2015-04-29 河南煤业化工集团研究院有限责任公司 Method for pre-pumping coal roadway stripe gas of single soft protruded coal seam of unexploited area
CN102337919B (en) * 2011-09-01 2015-01-07 河南理工大学 A four-period-five-purpose hole-drilling high-efficiency gas extracting process
CN102518464B (en) * 2011-12-09 2014-06-18 中国神华能源股份有限公司 Method for extracting gas at corner on recovery working face in coal mine
CN102661167B (en) * 2012-05-10 2015-01-07 中国矿业大学 Protected seam bottom plate upward comb-shaped drilled hole gas extraction method
CN102828769B (en) * 2012-09-20 2014-08-20 中煤科工集团重庆研究院 Complete oil receiving, pumping and conveying device for pumping and extracting mine gas
CN102979498B (en) * 2012-11-12 2016-01-20 中国石油天然气股份有限公司 A kind of multi-lateral horizontal well system for coal bed gas
CN103437705B (en) * 2013-08-19 2015-06-03 河南理工大学 Directional and quick hole-forming device for mining-coal bed gas extraction multi-branch holes
CN103410557B (en) * 2013-08-31 2015-10-28 山西潞安环保能源开发股份有限公司常村煤矿 Single, low air permeability coal seam mash gas harnessing method
CN104819008B (en) * 2015-04-17 2016-04-27 陕西福瑞德石油科技有限公司 A kind of efficient pumping method of coal-bed gas
CN105909254B (en) * 2016-04-29 2018-04-24 中煤科工集团西安研究院有限公司 Projecting coal bed bottom plate, which is faced upward, wears the advanced area cover coal roadway tunneling method of layer directional hole
CN106150541B (en) * 2016-07-05 2019-06-18 安徽理工大学 A kind of bottom plate directional drilling group and neighbouring lower protected seam gas pumping method
CN106285477B (en) * 2016-08-30 2018-06-19 中煤科工集团西安研究院有限公司 Underground coal mine adopt gas pumping top plate face upward wear layer orientation hole construction method
CN106639877B (en) * 2016-12-31 2019-12-20 河南理工大学 Variable-track drilling method and device
CN106907175B (en) * 2017-05-02 2019-06-04 中国矿业大学 The efficient extraction coal roadway stripe gas of bottom plate concordant long drilled holes staged fracturing and region outburst elimination method
CN107100663B (en) * 2017-05-02 2019-08-06 中国矿业大学 A kind of accurate pumping method of coal mine gas
CN108180035B (en) * 2018-01-30 2020-11-24 中煤科工集团重庆研究院有限公司 Gas extraction method for combined operation of drilling and permeability increasing of high-gas low-permeability coal seam
CN108374637A (en) * 2018-03-26 2018-08-07 四川川煤华荣能源股份有限公司 It is adapted to high inclination-angle soft coal level leting speeper drilling construction method
CN108518182B (en) * 2018-04-16 2020-04-24 中煤科工集团西安研究院有限公司 Water body exploration and discharge method and device for dendritic directional drilling advanced area with multiple aquifers on top plate
CN108590716A (en) * 2018-04-18 2018-09-28 中国矿业大学 A kind of tunnel crosses rich water tomography tree root type and dredges water blockoff integral construction method
CN108875152B (en) * 2018-05-28 2019-09-27 湖南科技大学 A kind of tunnel tunnel face calculating method for stability considering penetration
CN109113782A (en) * 2018-08-15 2019-01-01 河南铁福来装备制造股份有限公司 A method of cave gas control is made suitable for coal mine suction road downlink drilling
CN109252888A (en) * 2018-08-15 2019-01-22 河南铁福来装备制造股份有限公司 The process of cave shielding driving is made in a kind of lane directional drilling of a coal mine high position
CN109403867A (en) * 2018-10-15 2019-03-01 西山煤电(集团)有限责任公司 Outburst elimination method is taken out in advance across the progressive pectination drilling driving band of face deep camber is adopted
CN109763857B (en) * 2019-04-01 2020-09-18 中煤科工集团西安研究院有限公司 Water jet dense comb-shaped drilling type outburst elimination pre-extraction treatment method for coal seam gas to be tunneled
CN110685734B (en) * 2019-10-24 2021-01-29 中煤科工集团西安研究院有限公司 Panel gas treatment method based on partition step-by-step increasing tree-shaped directional long drilling
CN111173555A (en) * 2020-01-07 2020-05-19 山西晋煤集团技术研究院有限责任公司 Drilling and punching integrated construction process for comb-shaped long drilling hole of bottom suction roadway
CN111255463B (en) * 2020-02-21 2021-06-22 中煤科工集团西安研究院有限公司 Hard top plate comb-shaped long drilling segmented fracturing roadway deformation source treatment method
CN111287656B (en) * 2020-03-24 2021-04-30 中煤科工集团西安研究院有限公司 High-position large-diameter directional drilling construction method for complex roof
CN111520131A (en) * 2020-04-08 2020-08-11 中国矿业大学 Device and method for measuring coal seam gas pressure in situ at ultra-long distance
CN111577282A (en) * 2020-05-26 2020-08-25 内蒙古福城矿业有限公司 High-low negative pressure separate source coal mine gas drainage process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005071226A1 (en) * 2004-01-23 2005-08-04 Udo Adam Method for extracting a mine gas in areas which are not directly influenced by mining
CN101144389A (en) * 2007-04-06 2008-03-19 中国矿业大学 Gridding type layer-through drilling pore group permeability-increasing gas pumping method
CN101446178A (en) * 2008-11-13 2009-06-03 煤炭科学研究总院西安研究院 Wind pressure air drilling equipment in downhole soft outbursting coal bed and process matched therewith
CN101899950A (en) * 2010-07-14 2010-12-01 中国矿业大学 Method for hydraulically drilling high-stress coal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005071226A1 (en) * 2004-01-23 2005-08-04 Udo Adam Method for extracting a mine gas in areas which are not directly influenced by mining
CN101144389A (en) * 2007-04-06 2008-03-19 中国矿业大学 Gridding type layer-through drilling pore group permeability-increasing gas pumping method
CN101446178A (en) * 2008-11-13 2009-06-03 煤炭科学研究总院西安研究院 Wind pressure air drilling equipment in downhole soft outbursting coal bed and process matched therewith
CN101899950A (en) * 2010-07-14 2010-12-01 中国矿业大学 Method for hydraulically drilling high-stress coal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015157812A1 (en) * 2014-04-14 2015-10-22 Peabody Energy Australia A multi purpose drilling system and method
AU2015246646B2 (en) * 2014-04-14 2018-12-06 Peabody Energy Australia Pty Ltd A multi purpose drilling system and method
CN111305891A (en) * 2019-12-03 2020-06-19 安徽理工大学 Three-dimensional comprehensive efficient and accurate treatment technical method for coal-oil-gas coexisting mine
CN111305891B (en) * 2019-12-03 2021-06-25 安徽理工大学 Three-dimensional comprehensive efficient and accurate treatment technical method for coal-oil-gas coexisting mine

Also Published As

Publication number Publication date
CN102031950A (en) 2011-04-27

Similar Documents

Publication Publication Date Title
CN102031950B (en) Hole-forming process method for comb gas extraction borehole in coal seam roof
CN102979498B (en) A kind of multi-lateral horizontal well system for coal bed gas
CN101936155B (en) Distributed structure of horizontal section of multi-branch horizontal coal bed methane well
CN102392678A (en) Gas drainage method combining surface and underground fracturing and permeability improvement
CN102392677A (en) Permeability improvement technology for coal bed gas reservoir cap by using three-dimensional fracture network modification
CN104047629B (en) The method that thin coal bed fully-mechanized mining gob side entry retaining directional drilling extraction closes on lower coal-bed gas
CN101210481B (en) Large curvature radiation horizontal well drilling technique and device
CN102080526A (en) Method for extracting gas from bedding level fractured well of ground coal seam roof
CN102661167B (en) Protected seam bottom plate upward comb-shaped drilled hole gas extraction method
CN103362539A (en) Method for extracting pressure relief gas by retained roadway drill site drilling
CN105971662A (en) Method for gas extraction by coal seam roof weakening through L-shaped drilling staged fracturing
CN103867180B (en) A kind of coal bed gas horizontal well method for controlling trajectory
CN104975868A (en) Top plate high-position boring large-diameter long-drill-hole gas extraction method based on directional drilling
CN104763398A (en) Mining method for deformed coal coalbed methane for V-shaped well bottom plate auxiliary layer
CN102877857A (en) Deep hole pre-grouting top plate reinforcement method for large-mining height working face under special geological conditions
CN110306934B (en) Construction method for large-diameter high-position directional long drill hole of double-branch top plate
CN1317483C (en) Method of entering target geologic body and system
CN104196453A (en) Coalbed methane development well
CN101915118A (en) Method for progressive gas drainage in high gas medium-hard coal seam
CN104481536A (en) Cover rock crack and surface subsidence controlled digging, mining and filling parallel operation coal mining method
CN103362541A (en) Method for locally improving coal seam air permeability in coal seam with high gas and low air permeability
CN206129155U (en) All -round both arms hydraulic pressure tunnelling drill carriage device for coal mine
CN103835647A (en) Method for drilling floating pebble bed
CN108301866A (en) Mining of closed distance coal seam group adjacent layer gas pressure relief directional drilling stops pumping method
CN204024473U (en) Cbm development well

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: CHINA COAL TECHNOLOGY + ENGINEERING GROUP XI AN RE

Free format text: FORMER NAME: SIAN BRANCH OF CHINA COAL RESEARCH INSTITUTE

CP03 Change of name, title or address

Address after: 710075 Xi'an high tech Industrial Development Zone, Shaanxi, Jin Jin Road, No. 82

Patentee after: China Coal Technology & Engineering Group Xi'an Research Institute

Address before: 710054 No. 52, Yanta Road, Xi'an, Shaanxi

Patentee before: Sian Branch Of China Coal Research Institute

C56 Change in the name or address of the patentee

Owner name: XI AN RESEARCH INSTITUTE OF CHINA COAL TECHNOLOGY

Free format text: FORMER NAME: CHINA COAL TECHNOLOGY + ENGINEERING GROUP XI AN RESEARCH INSTITUTE

CP01 Change in the name or title of a patent holder

Address after: 710075 Xi'an high tech Industrial Development Zone, Shaanxi, Jin Jin Road, No. 82

Patentee after: Xi'an Research Institute, CCTEG

Address before: 710075 Xi'an high tech Industrial Development Zone, Shaanxi, Jin Jin Road, No. 82

Patentee before: China Coal Technology & Engineering Group Xi'an Research Institute